Sometimes called "Yoner", is when one gets an
erection from excessive yawning. They will often come about with no warning and are usually harder than a normal erection. They will usually happen in the
morning, often during class or at
work.
Guy 1:
Woah dude are you getting off to our math lesson?
Guy 2: No dude I've got a
massive yawn boner
right
Guy 1: Oh damn I hate yoners